This book, save for one chapter, is not concerned with artists. It is concerned with men and women who achieved a degree of prominence or notoriety in the Paris of their day, but whose reputations have been dimmed by time. While they are not 'world-historical' figures in the Hegelian sense, each one seems to me to reflect some aspect of society and attitudes of nineteenth-century Parisians. Indeed, they may be even more representative of their times than are certified geniuses, those whose stature makes them exceptional rather than typical.
I mainly read this for the piece, Delphine Gay de Girardin (1804-1855), Princess of the salons. I did think the pieces tended to be a bit too short, which is why I gave this 3.5 stars, but good for introductory research.